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Code Issues 15 Releases 21 Activity

Split functions from their declarations

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This splits occurrences of functions from their declaration. This is
necessary to flag integer functions consistently and not just single
occurrences.
This commit is contained in:
Patrick Lühne 2018-04-19 15:41:36 +02:00 committed by Patrick Lühne
parent d0debc6ad1
commit 618189368c
Signed by: patrick
GPG Key ID: 05F3611E97A70ABF
9 changed files with 87 additions and 37 deletions
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34
include/anthem/AST.h
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@ -105,13 +105,13 @@ struct Comparison
struct Function
{
explicit Function(std::string &&name)
: name{std::move(name)}
explicit Function(FunctionDeclaration *declaration)
: declaration{declaration}
{
}
explicit Function(std::string &&name, std::vector<Term> &&arguments)
: name{std::move(name)},
explicit Function(FunctionDeclaration *declaration, std::vector<Term> &&arguments)
: declaration{declaration},
arguments{std::move(arguments)}
{
}
@ -121,12 +121,36 @@ struct Function
Function(Function &&other) noexcept = default;
Function &operator=(Function &&other) noexcept = default;
std::string name;
FunctionDeclaration *declaration;
std::vector<Term> arguments;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
struct FunctionDeclaration
{
explicit FunctionDeclaration(std::string &&name)
: name{std::move(name)}
{
}
explicit FunctionDeclaration(std::string &&name, size_t arity)
: name{std::move(name)},
arity{arity}
{
}
FunctionDeclaration(const FunctionDeclaration &other) = delete;
FunctionDeclaration &operator=(const FunctionDeclaration &other) = delete;
FunctionDeclaration(FunctionDeclaration &&other) noexcept = default;
FunctionDeclaration &operator=(FunctionDeclaration &&other) noexcept = default;
std::string name;
size_t arity;
};
////////////////////////////////////////////////////////////////////////////////////////////////////
// TODO: refactor (limit element type to primitive terms)
struct In
{

1
include/anthem/ASTForward.h
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@ -27,6 +27,7 @@ struct Comparison;
struct Exists;
struct ForAll;
struct Function;
struct FunctionDeclaration;
struct Implies;
struct In;
struct Integer;

8
include/anthem/Body.h
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@ -76,7 +76,7 @@ struct BodyTermTranslateVisitor
for (size_t i = 0; i < function.arguments.size(); i++)
{
auto &argument = function.arguments[i];
conjunction.arguments.emplace_back(ast::Formula::make<ast::In>(ast::Variable(parameters[i].get()), translate(argument, ruleContext, variableStack)));
conjunction.arguments.emplace_back(ast::Formula::make<ast::In>(ast::Variable(parameters[i].get()), translate(argument, ruleContext, context, variableStack)));
}
variableStack.pop();
@ -121,7 +121,7 @@ struct BodyLiteralTranslateVisitor
}
// TODO: refactor
std::optional<ast::Formula> visit(const Clingo::AST::Comparison &comparison, const Clingo::AST::Literal &literal, RuleContext &ruleContext, Context &, ast::VariableStack &variableStack)
std::optional<ast::Formula> visit(const Clingo::AST::Comparison &comparison, const Clingo::AST::Literal &literal, RuleContext &ruleContext, Context &context, ast::VariableStack &variableStack)
{
// Comparisons should never have a sign, because these are converted to positive comparisons by clingo
if (literal.sign != Clingo::AST::Sign::None)
@ -136,8 +136,8 @@ struct BodyLiteralTranslateVisitor
ast::And conjunction;
conjunction.arguments.reserve(3);
conjunction.arguments.emplace_back(ast::Formula::make<ast::In>(ast::Variable(parameters[0].get()), translate(comparison.left, ruleContext, variableStack)));
conjunction.arguments.emplace_back(ast::Formula::make<ast::In>(ast::Variable(parameters[1].get()), translate(comparison.right, ruleContext, variableStack)));
conjunction.arguments.emplace_back(ast::Formula::make<ast::In>(ast::Variable(parameters[0].get()), translate(comparison.left, ruleContext, context, variableStack)));
conjunction.arguments.emplace_back(ast::Formula::make<ast::In>(ast::Variable(parameters[1].get()), translate(comparison.right, ruleContext, context, variableStack)));
conjunction.arguments.emplace_back(ast::Formula::make<ast::Comparison>(operator_, ast::Variable(parameters[0].get()), ast::Variable(parameters[1].get())));
return ast::Formula::make<ast::Exists>(std::move(parameters), std::move(conjunction));

22
include/anthem/Context.h
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@ -53,6 +53,26 @@ struct Context
return predicateDeclarations.back().get();
}
ast::FunctionDeclaration *findOrCreateFunctionDeclaration(const char *name, size_t arity)
{
const auto matchesExistingFunctionDeclaration =
[&](const auto &functionDeclarations)
{
return (functionDeclarations->arity == arity
&& strcmp(functionDeclarations->name.c_str(), name) == 0);
};
auto matchingFunctionDeclaration = std::find_if(functionDeclarations.begin(),
functionDeclarations.end(), matchesExistingFunctionDeclaration);
if (matchingFunctionDeclaration != functionDeclarations.end())
return matchingFunctionDeclaration->get();
functionDeclarations.emplace_back(std::make_unique<ast::FunctionDeclaration>(name, arity));
return functionDeclarations.back().get();
}
output::Logger logger;
bool performSimplification{false};
@ -61,6 +81,8 @@ struct Context
std::vector<std::unique_ptr<ast::PredicateDeclaration>> predicateDeclarations;
ast::PredicateDeclaration::Visibility defaultPredicateVisibility{ast::PredicateDeclaration::Visibility::Visible};
std::vector<std::unique_ptr<ast::FunctionDeclaration>> functionDeclarations;
bool externalStatementsUsed{false};
bool showStatementsUsed{false};

2
include/anthem/Equality.h
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@ -305,7 +305,7 @@ struct TermEqualityVisitor
const auto &otherFunction = otherTerm.get<Function>();
if (function.name != otherFunction.name)
if (function.declaration != otherFunction.declaration)
return Tristate::False;
if (function.arguments.size() != otherFunction.arguments.size())

2
include/anthem/StatementVisitor.h
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@ -87,7 +87,7 @@ struct StatementVisitor
const auto auxiliaryHeadVariableID = ruleContext.headVariablesStartIndex + i - ruleContext.headTerms.cbegin();
auto element = ast::Variable(ruleContext.freeVariables[auxiliaryHeadVariableID].get());
auto set = translate(headTerm, ruleContext, variableStack);
auto set = translate(headTerm, ruleContext, context, variableStack);
auto in = ast::In(std::move(element), std::move(set));
antecedent.arguments.emplace_back(std::move(in));

49
include/anthem/Term.h
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@ -65,13 +65,13 @@ ast::UnaryOperation::Operator translate(Clingo::AST::UnaryOperator unaryOperator
////////////////////////////////////////////////////////////////////////////////////////////////////
ast::Term translate(const Clingo::AST::Term &term, RuleContext &ruleContext, const ast::VariableStack &variableStack);
ast::Term translate(const Clingo::AST::Term &term, RuleContext &ruleContext, Context &context, const ast::VariableStack &variableStack);
////////////////////////////////////////////////////////////////////////////////////////////////////
struct TermTranslateVisitor
{
std::optional<ast::Term> visit(const Clingo::Symbol &symbol, const Clingo::AST::Term &term, RuleContext &ruleContext, const ast::VariableStack &variableStack)
std::optional<ast::Term> visit(const Clingo::Symbol &symbol, const Clingo::AST::Term &term, RuleContext &ruleContext, Context &context, const ast::VariableStack &variableStack)
{
switch (symbol.type())
{
@ -85,19 +85,19 @@ struct TermTranslateVisitor
return ast::Term::make<ast::String>(std::string(symbol.string()));
case Clingo::SymbolType::Function:
{
auto function = ast::Term::make<ast::Function>(symbol.name());
// TODO: remove workaround
auto &functionRaw = function.get<ast::Function>();
functionRaw.arguments.reserve(symbol.arguments().size());
auto functionDeclaration = context.findOrCreateFunctionDeclaration(symbol.name(), symbol.arguments().size());
auto function = ast::Function(functionDeclaration);
function.arguments.reserve(symbol.arguments().size());
for (const auto &argument : symbol.arguments())
{
auto translatedArgument = visit(argument, term, ruleContext, variableStack);
auto translatedArgument = visit(argument, term, ruleContext, context, variableStack);
if (!translatedArgument)
throw TranslationException(term.location, "could not translate argument");
functionRaw.arguments.emplace_back(std::move(translatedArgument.value()));
function.arguments.emplace_back(std::move(translatedArgument.value()));
}
return std::move(function);
@ -107,7 +107,7 @@ struct TermTranslateVisitor
return std::nullopt;
}
std::optional<ast::Term> visit(const Clingo::AST::Variable &variable, const Clingo::AST::Term &, RuleContext &ruleContext, const ast::VariableStack &variableStack)
std::optional<ast::Term> visit(const Clingo::AST::Variable &variable, const Clingo::AST::Term &, RuleContext &ruleContext, Context &, const ast::VariableStack &variableStack)
{
const auto matchingVariableDeclaration = variableStack.findUserVariableDeclaration(variable.name);
const auto isAnonymousVariable = (strcmp(variable.name, "_") == 0);
@ -120,35 +120,36 @@ struct TermTranslateVisitor
auto variableDeclaration = std::make_unique<ast::VariableDeclaration>(ast::VariableDeclaration::Type::UserDefined, std::string(variable.name));
ruleContext.freeVariables.emplace_back(std::move(variableDeclaration));
// TODO: ast::Term::make is unnecessary and can be removed
return ast::Term::make<ast::Variable>(ruleContext.freeVariables.back().get());
}
std::optional<ast::Term> visit(const Clingo::AST::BinaryOperation &binaryOperation, const Clingo::AST::Term &term, RuleContext &ruleContext, const ast::VariableStack &variableStack)
std::optional<ast::Term> visit(const Clingo::AST::BinaryOperation &binaryOperation, const Clingo::AST::Term &term, RuleContext &ruleContext, Context &context, const ast::VariableStack &variableStack)
{
const auto operator_ = translate(binaryOperation.binary_operator, term);
auto left = translate(binaryOperation.left, ruleContext, variableStack);
auto right = translate(binaryOperation.right, ruleContext, variableStack);
auto left = translate(binaryOperation.left, ruleContext, context, variableStack);
auto right = translate(binaryOperation.right, ruleContext, context, variableStack);
return ast::Term::make<ast::BinaryOperation>(operator_, std::move(left), std::move(right));
}
std::optional<ast::Term> visit(const Clingo::AST::UnaryOperation &unaryOperation, const Clingo::AST::Term &term, RuleContext &ruleContext, const ast::VariableStack &variableStack)
std::optional<ast::Term> visit(const Clingo::AST::UnaryOperation &unaryOperation, const Clingo::AST::Term &term, RuleContext &ruleContext, Context &context, const ast::VariableStack &variableStack)
{
const auto operator_ = translate(unaryOperation.unary_operator, term);
auto argument = translate(unaryOperation.argument, ruleContext, variableStack);
auto argument = translate(unaryOperation.argument, ruleContext, context, variableStack);
return ast::Term::make<ast::UnaryOperation>(operator_, std::move(argument));
}
std::optional<ast::Term> visit(const Clingo::AST::Interval &interval, const Clingo::AST::Term &, RuleContext &ruleContext, const ast::VariableStack &variableStack)
std::optional<ast::Term> visit(const Clingo::AST::Interval &interval, const Clingo::AST::Term &, RuleContext &ruleContext, Context &context, const ast::VariableStack &variableStack)
{
auto left = translate(interval.left, ruleContext, variableStack);
auto right = translate(interval.right, ruleContext, variableStack);
auto left = translate(interval.left, ruleContext, context, variableStack);
auto right = translate(interval.right, ruleContext, context, variableStack);
return ast::Term::make<ast::Interval>(std::move(left), std::move(right));
}
std::optional<ast::Term> visit(const Clingo::AST::Function &function, const Clingo::AST::Term &term, RuleContext &ruleContext, const ast::VariableStack &variableStack)
std::optional<ast::Term> visit(const Clingo::AST::Function &function, const Clingo::AST::Term &term, RuleContext &ruleContext, Context &context, const ast::VariableStack &variableStack)
{
if (function.external)
throw TranslationException(term.location, "external functions currently unsupported");
@ -157,12 +158,14 @@ struct TermTranslateVisitor
arguments.reserve(function.arguments.size());
for (const auto &argument : function.arguments)
arguments.emplace_back(translate(argument, ruleContext, variableStack));
arguments.emplace_back(translate(argument, ruleContext, context, variableStack));
return ast::Term::make<ast::Function>(function.name, std::move(arguments));
auto functionDeclaration = context.findOrCreateFunctionDeclaration(function.name, function.arguments.size());
return ast::Term::make<ast::Function>(functionDeclaration, std::move(arguments));
}
std::optional<ast::Term> visit(const Clingo::AST::Pool &, const Clingo::AST::Term &term, RuleContext &, const ast::VariableStack &)
std::optional<ast::Term> visit(const Clingo::AST::Pool &, const Clingo::AST::Term &term, RuleContext &, Context &, const ast::VariableStack &)
{
throw TranslationException(term.location, "“pool” terms currently unsupported");
return std::nullopt;
@ -171,9 +174,9 @@ struct TermTranslateVisitor
////////////////////////////////////////////////////////////////////////////////////////////////////
ast::Term translate(const Clingo::AST::Term &term, RuleContext &ruleContext, const ast::VariableStack &variableStack)
ast::Term translate(const Clingo::AST::Term &term, RuleContext &ruleContext, Context &context, const ast::VariableStack &variableStack)
{
auto translatedTerm = term.data.accept(TermTranslateVisitor(), term, ruleContext, variableStack);
auto translatedTerm = term.data.accept(TermTranslateVisitor(), term, ruleContext, context, variableStack);
if (!translatedTerm)
throw TranslationException(term.location, "could not translate term");

4
include/anthem/output/AST.h
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@ -169,7 +169,7 @@ inline output::ColorStream &print(output::ColorStream &stream, const Comparison
inline output::ColorStream &print(output::ColorStream &stream, const Function &function, PrintContext &printContext, bool)
{
stream << function.name;
stream << function.declaration->name;
if (function.arguments.empty())
return stream;
@ -184,7 +184,7 @@ inline output::ColorStream &print(output::ColorStream &stream, const Function &f
print(stream, *i, printContext);
}
if (function.name.empty() && function.arguments.size() == 1)
if (function.declaration->name.empty() && function.arguments.size() == 1)
stream << ",";
stream << ")";

2
src/anthem/ASTCopy.cpp
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@ -105,7 +105,7 @@ Comparison prepareCopy(const Comparison &other)
Function prepareCopy(const Function &other)
{
return Function(std::string(other.name), prepareCopy(other.arguments));
return Function(other.declaration, prepareCopy(other.arguments));
}
////////////////////////////////////////////////////////////////////////////////////////////////////